2Courcier M. and Lafay G., 1972, "Simulation economique multinationale," Statistique & Etudes Finaucieres, 1972/8, 4^ene trimestre.
3Fujiata M., Krugman P. and Venables A.J., 1999, The Spatial Economy: Cities, Regions and International Trade, the MIT Press.
4Hummels D., 1999a, "Toward a Geography of Trade Costs," site: http://gsbwww.uchiago. edu/fac/david, hummels / research / vs /.
5Hurnmels, D., 1999b, "Have International Transportation Costs Dechned?" site: http://gsbwww.uchicago . edu/ fac / david, hummels .
6Luo X., 2001, "La mesure de la distance dans le module de gravite - une application au commerce bilat6ral entre les provinces chinoises avec le Japon," Revue Region et Developpement, No. 13.
7张青.未来十年十大消费热点.证券时报,1999.11.07
8Don Pickrell. Cars and Clean Air: A Reappraisal. Transportation Research, 1999 Part A,Vol.33:527 ～ 547
9Forkenbrok. David. external costs of intercity truck freight.Transportation Research, 1999 Part A, Vol. 33: 505 ～ 526
10John F. Kain, Zhi Liu. Secrets of Success: How Houston and San Diego Transit Providers, Achievel Large Increases in transit Ridership. Prepared for Federal Transit Administration, 1995
